HDR delivered [as HDR or HDR10+ andor DV andor HLG] via: YCbCr vs. nonlinear scRGB vs. scRGB [linear-swapchain for nonlinear] vs. ICtCp (respectively upon gamut of Rec.2020RGB vs. scRGB vs. ITP) vs. a different means, having exherited from ACEScg (AP1 gamut): Which is optimal?

I have read that ICtCp is superior to YCbCr for various benefits pertaining to precision and that linear scRGB offers even more breadth of values via floating point but many of them exist outside of real values (thus applying it may be trickier?). What are the proes and cons to each (including method[s] of HDR as may be applicable), realization how?